[PATCH v8 22/24] drm/xe: Enter ULLS for migration jobs upon page fault or SVM prefetch

[Matthew Brost <matthew.brost@intel.com>]

Call xe_migrate_ulls_enter upon page fault or SVM prefetch in an
effort speed up these critical paths.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Maarten Lankhorst <dev@lankhorst.se>
---
 drivers/gpu/drm/xe/xe_pagefault.c | 3 +++
 drivers/gpu/drm/xe/xe_vm.c        | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_pagefault.c b/drivers/gpu/drm/xe/xe_pagefault.c
index f9e5bd41cfd1..f219e9e3b73e 100644
--- a/drivers/gpu/drm/xe/xe_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_pagefault.c
@@ -15,6 +15,7 @@
 #include "xe_gt_stats.h"
 #include "xe_hw_engine.h"
 #include "xe_log.h"
+#include "xe_migrate.h"
 #include "xe_pagefault.h"
 #include "xe_pagefault_types.h"
 #include "xe_pm.h"
@@ -281,6 +282,8 @@ static int xe_pagefault_service(struct xe_pagefault *pf)
 	if (IS_ERR(vm))
 		return PTR_ERR(vm);
 
+	xe_migrate_ulls_enter(gt_to_tile(gt)->migrate);
+
 	down_read(&vm->lock);
 
 	if (xe_vm_is_closed(vm)) {
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index f66bd1de2b70..425c678f4480 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2528,8 +2528,10 @@ vm_bind_ioctl_ops_create(struct xe_vm *vm, struct xe_vma_ops *vops,
 			ctx.devmem_possible = IS_DGFX(vm->xe) &&
 					      IS_ENABLED(CONFIG_DRM_XE_PAGEMAP);
 
-			for_each_tile(tile, vm->xe, id)
+			for_each_tile(tile, vm->xe, id) {
+				xe_migrate_ulls_enter(tile->migrate);
 				tile_mask |= 0x1 << id;
+			}
 
 			if (prefetch_region == DRM_XE_CONSULT_MEM_ADVISE_PREF_LOC) {
 				dpagemap = xe_vma_resolve_pagemap(vma,
-- 
2.34.1